What film are you thinking of reviewing? What publication are going to review it for?
What technical and/or thematic features make the film of particular interest to you?
The more you consider in advance why you want to review the film, how you want to review it, for whom you are reviewing it, and so on, the more likely you are to produce an effective piece that can therefore be rewarded highly.
Post your initial ideas in the comments section below, please.